CN101058090A - Anticorrosion powder-liquid cross-linked coating technology for inner wall of steel pipe - Google Patents
Anticorrosion powder-liquid cross-linked coating technology for inner wall of steel pipe Download PDFInfo
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- CN101058090A CN101058090A CN 200710079624 CN200710079624A CN101058090A CN 101058090 A CN101058090 A CN 101058090A CN 200710079624 CN200710079624 CN 200710079624 CN 200710079624 A CN200710079624 A CN 200710079624A CN 101058090 A CN101058090 A CN 101058090A
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- 238000000576 coating method Methods 0.000 title claims abstract description 201
- 239000011248 coating agent Substances 0.000 title claims abstract description 196
- 239000007788 liquid Substances 0.000 title claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 59
- 239000010959 steel Substances 0.000 title claims abstract description 59
- 238000005516 engineering process Methods 0.000 title claims description 36
- 238000004132 cross linking Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 238000007711 solidification Methods 0.000 claims abstract description 16
- 230000008023 solidification Effects 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000003973 paint Substances 0.000 claims description 41
- 239000000428 dust Substances 0.000 claims description 37
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000005422 blasting Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000012943 hotmelt Substances 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 150000002170 ethers Chemical class 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 18
- 239000011247 coating layer Substances 0.000 abstract 4
- 238000001816 cooling Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 230000036760 body temperature Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000010410 dusting Methods 0.000 description 6
- 238000003556 assay Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920006389 polyphenyl polymer Polymers 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 150000003568 thioethers Chemical class 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Abstract
The invention relates to a steel tube inner wall antiseption fluid crosslinking coating technique which comprises selecting organic liquid coating material and organic powder coating material that are homogeneous organic coating material, with crosslinking reaction temperature lower than solidification temperature, sanding for the inner surface of the steel tube, spraying organic liquid coating layer to the inside of the tube, baking the coating layer to semi solid state, and preheating it, spraying organic powder coating material using fusing method, then implementing organic liquid coating material and organic powder coating material crosslinking reaction, solidifying and cooling to normal temperature. It can reach long term antiseption requirement, that is super binding force of the coating layer and the base, zero coating layer micro defect, high surface smoothness and high fineness coating system.
Description
Technical field
The present invention relates to a kind of inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology.This coating process belongs to anticorrosive paint and is applied to the application that the steel pipe inwall is realized a new technology of heavy anticorrosion organic coating.
Background technology
Present steel pipe inwall anticorrosion coat technology mainly contains two kinds of liquid organic coating technology and powder organic coating technologies.
Liquid organic coating technology is conventional coatings technology, and the main technique flow process is: this several roads master operation of sandblast pre-treatment-airless spraying-coating curing-coating detection-finished product.Liquid coating makes coating and metal base that superpower adhesion arranged owing to adopt advanced high-pressure gasless plating technique, and these characteristics enjoy long-acting anticorrosion coat personage's favor; But liquid coating since when solidifying solvent evaporates cause a lot of coating microdefects and coating structure not fine and close, a series of defectives such as surface smoothness is relatively poor, surface smoothness is relatively poor to be made the coating surface fouling easily and adheres to organic matter, not fine and close the long-lasting of coating antiseptic that influenced of coating microdefect and coating structure, these reasons have hindered the application of liquid coating at long-acting heavy corrosion-resistant field.
The powder organic coating is a developed recently, and its main technique is: sandblast pre-treatment-static or hot melt dust-several roads master operations such as coating curing-coating detection-finished product.Owing to itself there is not volatile solvent to stop the coating microdefect, have very high surface smoothness and high dense coating system simultaneously, effectively stoped dirt and entered organic adhering to corrosive medium, these advantages are long-actingly heavyly anticorrosion must have.But owing to adopt static or hot melt spraying, make there is a lot of micro bubbles between coating and the metallic matrix that the existence of micro bubbles greatly reduces the adhesion between coating and the matrix, this is again that long-acting heavy anticorrosion institute is unallowable.
As from the foregoing, existing organic coating technology is the needs that liquid coating technology or powder body coating technology all can not satisfy long-acting anticorrosion coat performance.
Summary of the invention
The purpose of this invention is to provide a kind of inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology.Technology of the present invention can reach long-acting heavy corrosion-resistant requirement: i.e. the superpower adhesion of coating and metal base, zero coating microdefect, high coating surface fineness, high dense coating system.
In order to realize above-mentioned goal of the invention, the present invention adopts following technical scheme:
Inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology of the present invention comprises the steps:
(1), at first selects employed organic liquid coating and organic dust coating, employed organic dust coating is similar organic coating with organic liquid coating, and the cross-linking reaction of chemistry can take place in employed organic dust coating and organic liquid coating, the cross-linking reaction temperature is lower than solidification temperature, and employed liquid coating has identical solidification temperature with powdery paints;
(2), steel pipe internal-surface is carried out the dry type blasting treatment;
(3), the steel duct after blasting treatment sprays the shallow layer of organic liquid coating, the thickness of shallow layer is between 35～65 μ m, shallow layer thickness is even;
(4), the spraying after steel pipe leave standstill 30～60 minutes after, enter in the drying oven, under the semi-solid preparation temperature of employed organic liquid coating, toast, make shallow layer reach semi-cured state, hardness is between HB～1H; Baking temperature, time, the semi-solid preparation temperature of promptly employed organic liquid coating, and the semi-solid preparation time should provide by the paint supply merchant;
(5), after the shallow layer in the steel pipe reaches semi-cured state,, reach 15 ℃～30 ℃ above temperature of origin temp (lower limit) of the gelatinization temperature that is higher than employed organic dust coating again with steel pipe preheating 20～30 minutes in preheating furnace; Wherein, the gelatinization temperature of employed organic dust coating should be provided by the paint supply merchant;
(6), adopt the spraying method of hot melt to spray organic powdery paints, the temperature of steel pipe is not less than the origin temp (lower limit) of the gelatinization temperature of employed organic dust coating in the overall process of organic dust spraying, the thickness of organic dust coating between 150～250 μ m, uniform film thickness;
(7), behind the organic powdery paints of spraying, steel pipe is lower than in the steel pipe temperature before 20 ℃ of organic dust coating gelatinization temperature origin temp (lower limit), enter the cross-linking reaction constant temperature oven and carry out cross-linking reaction between organic liquid coating and organic dust coating, the temperature of cross-linking reaction constant temperature oven is controlled in the cross-linking reaction temperature range between employed organic liquid coating and employed organic dust coating; Wherein, cross-linking reaction temperature range and cross-linking reaction time should be provided by the paint supply merchant;
(8), after the coating cross-linking reaction, steel pipe enters in the curing oven and is cured, the temperature of curing oven is the solidification temperature of employed organic dust coating; Wherein, should provide the solidification temperature of organic dust coating and hardening time by the paint supply merchant;
(9), the steel pipe cool to room temperature of coating after solidifying, obtain the steel pipe of the anticorrosion powder-liquid cross-linked coating of inwall.The final mass of carrying out product at last detects.
In inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology of the present invention, described organic liquid coating and organic dust coating all are long-acting anticorrosive paints, are phenolic resins class coating, polyphenylene sulfide ethers coating or epoxy resin coating etc.
In inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology of the present invention, in described step (4), the thermal balance of furnace temperature field should be controlled in 10 ℃ in the drying oven; In described step (5), the uniformity of the steel pipe temperature in the preheating furnace should be controlled in 10 ℃.
In inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology of the present invention, in described step (2), be to adopt pressure-air abrasive flows mode to carry out the dry type blasting treatment, the derusting grade of the steel pipe internal-surface after the processing is at Sa3.0, anchor line degree reaches 30～80 μ m, the dustless cleaning of inner surface.
In inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology of the present invention, employed organic dust coating in the step (6) is similar organic coating with employed organic liquid coating in the step (3), and the cross-linking reaction of chemistry can take place the organic liquid coating of employed organic dust coating and use.Described similar organic coating just is meant that employed organic dust coating and employed organic liquid coating all are the same classes of phenolic resins class coating, or all is the same class of polyphenylene sulfide ethers coating, or all is the same class of epoxy resin coating etc.Organic dust coating, organic liquid coating are that similar organic coating is to guarantee to take place cross-linking reaction.If employed organic dust coating and employed organic liquid coating two class coating, but the cross-linking reaction of chemistry must be able to take place between this two classes coating, and the cross-linking reaction temperature is lower than final solidification temperature, also can use the two different class coating of the cross-linking reaction that chemistry can take place.The similar coating of preferred use.
Advantage of the present invention:
In order to reach the long-acting anticorrosion coat performance demands of steel pipe inwall, technology of the present invention is with pipeline anticorrosive paint-phenol-formaldehyde resin modified (liquid commonly used both at home and abroad, powder) is the basis, comprehensive liquid, the advantage of powder coating process, by test the anticorrosion powder-liquid cross-linked coating process of a kind of inner wall of steel pipe is proposed, in technology, adopt brand-new semi-solid preparation and cross-linking reaction new process, realized the cross-linking reaction between liquid and the powder coating, reached long-acting heavy corrosion-resistant requirement: be i.e. the superpower adhesion of coating and matrix, zero coating microdefect, high surface finish, high dense coating system.This technology can be widely used in other heavy corrosion-resistant field.
Technology of the present invention is to have adopted this critical process of cross-linking reaction of the powder-liquid under the coated semi solid state by a series of new processes such as change temperature controls, integral body is different from existing liquid coating technology and powder coating process, all is different from traditional handicraft from the liquid coating thickness to final curing etc.
The inventive point of technology of the present invention is the cross-linking reaction of the powder-liquid under the coated semi solid state.
The specific embodiment
Embodiment one: the long-acting anticorrosion coat technology-powder of 3-1/2 oil pipe pipe material inner wall-liquid crosslinking process
Employed coating type: modified phenolic resin grease coating material: ATC-2000 liquid coating and ATC-2000 powdery paints.
Employed coating material production producer: pacify the ATC-2000 coating in the eastern petroleum technology ATC of the group company series.
Employed coating property: the semi-solid preparation temperature of modified phenolic resin grease coating material-ATC-2000 liquid coating (the following ATC-2000 liquid coating that also claims) is 100 ℃, and solidification temperature is 210 ℃.The gelatinization temperature of modified phenolic resin grease coating material-ATC-2000 powdery paints (the following ATC-2000 powdery paints that also claims) is more than 160 ℃; Solidification temperature is 210 ℃, 60～90 minutes hardening times.The cross-linking reaction temperature of ATC-2000 liquid coating and ATC-2000 powdery paints is 160 °～180 ℃.Producer provides by coating material production.
Technical process: 3-1/2 oil pipe pipe material inner wall adopts the method for dry type derusting by sandblasting, derusting grade Sa3.0, and anchor line degree 35 μ m, inner surface purges through pressure-air, the dustless cleaning of inboard wall of tube body.Adopt airless spraying application ATC-2000 liquid coating, wet-film thickness 45 μ m, uniform film thickness.After shallow layer after the spraying leaves standstill 30 minutes, enter in the drying oven and toast, 100 ℃ of baking temperatures (promptly adopting the identical temperature of 100 ℃ of the semi-solid preparation temperature of ATC-2000 liquid coating), be incubated and come out of the stove after 40 minutes, hardness of paint film HB, paint film reach semi-cured state (thermal balance of furnace temperature field ± 4 ℃).With the semi-cured state coated steel pipe in the preheating furnace preheating, preheat temperature is 175 ℃, [for 15 ℃ the temperature of origin temp (lower limit) (160 ℃) of the gelatinization temperature that is higher than the ATC-2000 powdery paints], the body temperature reaches 175 ℃ after 20 minutes preheating time, and the body temperature is even.The back horse back of coming out of the stove sprays the ATC-2000 powdery paints, and the body temperature of dusting when finishing is 165 ℃, powdery paints thickness 200 μ m.Need to prove, the body temperature of dusting when finishing is 165 ℃, before the preheating furnace that enters 175 ℃ is incubated, steel pipe temperature 〉=140 after must guaranteeing to dust ℃ [being that steel pipe is lower than in the steel pipe temperature before 20 ℃ of organic dust coating gelatinization temperature origin temp (160 ℃)].The preheating furnace that enters 175 ℃ (for the temperature within 160 °～180 ℃ of the cross-linking reaction temperature of ATC-2000 liquid coating and ATC-2000 powdery paints) is incubated, and temperature retention time is 30 minutes (finishing the cross-linking reaction between powder and liquid coating).The continuous curing oven that enters 210 ℃ (promptly with ATC-2000 powdery paints 210 ℃ of identical temperature of solidification temperature) then is cured, and after 60 minutes hardening times, comes out of the stove, and detects coating quality.Implementation result: the check of the testing department-Xi'an tubing research institute by national appointment, think that this coating quality has possessed the requirement of long-effective corrosion coating fully, each field use is respond well at home, by using for a long time at different corrosive mediums, the producing well and the water injection well of temperature up to 150 ℃, coating does not change.
Embodiment two: the long-acting anticorrosion coat technology-powder of 5-1/2 drilling rod pipe material inner wall-liquid crosslinking process
Employed coating type, coating material production producer and coating property thereof are all with embodiment one.
Technical process: 5-1/2 oil pipe pipe material inner wall adopts the method for dry type derusting by sandblasting, derusting grade Sa3.0, and anchor line degree 75 μ m, inner surface purges through pressure-air, the dustless cleaning of inboard wall of tube body.Adopt airless spraying application ATC-2000 liquid coating, wet-film thickness 70 μ m, uniform film thickness.After shallow layer after the spraying leaves standstill 60 minutes, enter in the drying oven and toast, 100 ℃ of baking temperatures (promptly adopting the identical temperature of 100 ℃ of the semi-solid preparation temperature of ATC-2000 liquid coating), be incubated and come out of the stove after 60 minutes, hardness of paint film H, paint film reach semi-cured state (thermal balance of furnace temperature field ± 4 ℃).The semi-cured state coated steel pipe is in the preheating furnace preheating, preheat temperature is 180 ℃ [for 20 ℃ the temperature of origin temp (lower limit) (160 ℃) of the gelatinization temperature that is higher than the ATC-2000 powdery paints], the body temperature reaches 180 ℃ after 30 minutes preheating time, and the body temperature is even.The back horse back of coming out of the stove sprays the ATC-2000 powdery paints, and the body temperature of dusting when finishing is 165 ℃, powdery paints thickness 200 μ m.Need to prove, the body temperature of dusting when finishing is 165 ℃, before the preheating furnace that enters 175 ℃ is incubated, steel pipe temperature 〉=140 after must guaranteeing to dust ℃ [being that steel pipe is lower than in the steel pipe temperature before 20 ℃ of organic dust coating gelatinization temperature origin temp (160 ℃)].The preheating furnace that enters 180 ℃ (for the temperature within 160 °～180 ℃ of the cross-linking reaction temperature of ATC-2000 liquid coating and ATC-2000 powdery paints) is incubated, and temperature retention time is 60 minutes (finishing the cross-linking reaction between powder and liquid coating).The continuous curing oven that enters 210 ℃ (promptly with ATC-2000 powdery paints 210 ℃ of identical temperature of solidification temperature) then is cured, and after 90 minutes hardening times, comes out of the stove, and detects coating quality.Implementation result: the check of the testing department-Xi'an tubing research institute by national appointment, think that this coating quality has possessed the requirement of long-effective corrosion coating fully, each field use is respond well at home, and drilling depth reaches 8000 meters.
Embodiment three: the long-acting anticorrosion coat technology-powder of 3-1/2 oil pipe pipe material inner wall-liquid crosslinking process
Employed coating type: modified polyphenyl thioether coating, SGPPS-TWG liquid and SGPPS-TWG powder.
Employed coating material production producer: the SGPPS-TWG coating in the carefree plastics SGPPS of the Co., Ltd series of Chengdu.
Employed coating property: the semi-solid preparation temperature of modified polyphenyl thioether coating-SGPPS-TWG liquid coating (the following SGPPS-TWG liquid coating that also claims) is 340 ℃, and temperature retention time 10～30 minutes, solidification temperature are 370 ℃.The gelatinization temperature of modified polyphenyl thioether coating-SGPPS-TWG powdery paints (the following SGPPS-TWG powdery paints that also claims) is more than 320 ℃, and solidification temperature is 370 ℃, 20～60 minutes hardening times.The cross-linking reaction temperature of SGPPS-TWG liquid coating and SGPPS-TWG powdery paints is 350 °～365 ℃, is incubated 30～60 minutes.Producer provides by coating material production.
Technical process: 3-1/2 oil pipe pipe material inner wall adopts the method for dry type derusting by sandblasting, derusting grade Sa3.0, and anchor line degree 35 μ m, inner surface purges through pressure-air, the dustless cleaning of inboard wall of tube body.Adopt airless spraying application SGPPS-TWG liquid coating, wet-film thickness 30 μ m, uniform film thickness.After shallow layer after the spraying leaves standstill 30 minutes, enter in the drying oven and toast, 140 ℃ of baking temperatures, be incubated and come out of the stove after 40 minutes, the coating internal solvent is fully volatilized, be warming up to 340 ℃ (promptly adopting the identical temperature of 340 ℃ of the semi-solid preparation temperature of SGPPS-TWG liquid coating) then, be incubated 15 minutes, hardness of paint film 1H, paint film reach semi-cured state (thermal balance of furnace temperature field ± 4 ℃).The semi-cured state coated steel pipe is in the preheating furnace preheating, preheat temperature is 340 ℃ [for 20 ℃ the temperature of origin temp (lower limit) (320 ℃) of the gelatinization temperature that is higher than the SGPPS-TWG powdery paints], the body temperature reaches 340 ℃ after 20 minutes preheating time, and the body temperature is even.The back horse back of coming out of the stove sprays the SGPPS-TWG powdery paints, and the body temperature of dusting when finishing is 320 ℃, powdery paints thickness 250 μ m.Need to prove, the body temperature of dusting when finishing is 320 ℃, before the preheating furnace that enters 365 ℃ is incubated, steel pipe temperature 〉=300 after must guaranteeing to dust ℃ [being that steel pipe is lower than in the steel pipe temperature before 20 ℃ of organic dust coating gelatinization temperature origin temp (320 ℃)].The preheating furnace that enters 365 ℃ (for the temperature within 350 °～365 ℃ of the cross-linking reaction temperature of SGPPS-TWG liquid coating and SGPPS-TWG powdery paints) is incubated, and temperature retention time is 30 minutes (finishing the cross-linking reaction between powder and liquid coating).The continuous curing oven that enters 370 ℃ (promptly with SGPPS-TWG powdery paints 370 ℃ of identical temperature of solidification temperature) then is cured, after 40 minutes hardening times.Come out of the stove, detect coating quality.Implementation result: the check of the testing department-Xi'an tubing research institute by national appointment, think that this coating quality has possessed the requirement of long-effective corrosion coating fully, each field use is respond well at home, by using for a long time at different corrosive mediums, the producing well and the water injection well of temperature up to 180 ℃, coating does not change.After this coating was finished drill footage and reached 25000 meters, coating was intact.
Performance to the coating product of embodiments of the invention one, embodiment two, embodiment three is checked, wherein adhesive force, autoclave, wearability and leak source detect liquid flux type Internal Coating Technology of Drill Pipes condition-SY/T 0554-1995 formulation check of employing and international joint, outward appearance and surface smoothness adopt the method for inspection of powder coating, and assay is as follows:
Assay
Wherein, " ATC-2000 coating (5-1/2 and 3-1/2) " in the table is that embodiment one, embodiment two adopts technology of the present invention to use ATC-2000 coating respectively to the assay of the performance of the coating product of 3-1/2 oil pipe, 5-1/2 drilling rod pipe, and " SGPPS-TWG coating (3-1/2) " in the table is that embodiment three adopts technology of the present invention to use SGPPS-TWG coating respectively to the assay of the performance of the coating product of 3-1/2 oil pipe.
Can be learnt that by assay steel pipe inwall anticorrosion powder of the present invention-liquid crosslinking process has reached the whole requirements of the heavy corrosion-resistant of steel duct fully, partial properties is better than standard-required.Technology of the present invention can be widely used in other heavy corrosion-resistant field.
Claims (4)
1, a kind of inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology is characterized in that, this technology comprises the steps:
(1), at first selects employed organic liquid coating and organic dust coating, employed organic dust coating is similar organic coating with organic liquid coating, and the cross-linking reaction of chemistry can take place in employed organic dust coating and organic liquid coating, the cross-linking reaction temperature is lower than solidification temperature, and employed liquid coating has identical solidification temperature with powdery paints;
(2), steel pipe internal-surface is carried out the dry type blasting treatment;
(3), the steel duct after blasting treatment sprays the shallow layer of organic liquid coating, the thickness of shallow layer is between 35～65 μ m, shallow layer thickness is even;
(4), the spraying after steel pipe leave standstill 30～60 minutes after, enter in the drying oven, under the semi-solid preparation temperature of employed organic liquid coating, toast, make shallow layer reach semi-cured state, hardness is between HB～1H;
(5), after the shallow layer in the steel pipe reaches semi-cured state,, reach 15 ℃～30 ℃ above temperature of origin temp of the gelatinization temperature that is higher than employed organic dust coating again with steel pipe preheating 20～30 minutes in preheating furnace;
(6), adopt the spraying method of hot melt to spray organic powdery paints, the temperature of steel pipe is not less than the origin temp of the gelatinization temperature of employed organic dust coating in the overall process of organic dust spraying, the thickness of organic dust coating between 150～250 μ m, uniform film thickness;
(7), behind the organic powdery paints of spraying, steel pipe is lower than in the steel pipe temperature before 20 ℃ of organic dust coating gelatinization temperature origin temp, enter the cross-linking reaction constant temperature oven and carry out cross-linking reaction between organic liquid coating and organic dust coating, the temperature of cross-linking reaction constant temperature oven is controlled in the cross-linking reaction temperature range between employed organic liquid coating and employed organic dust coating;
(8), after the coating cross-linking reaction, steel pipe enters in the curing oven and is cured, the temperature of curing oven is the solidification temperature of employed organic dust coating;
(9), the steel pipe cool to room temperature of coating after solidifying, obtain the steel pipe of the anticorrosion powder-liquid cross-linked coating of inwall.
2, inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology according to claim 1, it is characterized in that: described organic liquid coating and organic dust coating all are long-acting anticorrosive paints, are phenolic resins class coating, polyphenylene sulfide ethers coating or epoxy resin coating.
3, inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology according to claim 1 and 2 is characterized in that: in described step (4), the thermal balance of furnace temperature field should be controlled in 10 ℃ in the drying oven; In described step (5), the uniformity of the steel pipe temperature in the preheating furnace should be controlled in 10 ℃.
4, inner wall of steel pipe anticorrosion powder-liquid cross-linked coating technology according to claim 1, it is characterized in that: in described step (2), be to adopt pressure-air abrasive flows mode to carry out the dry type blasting treatment, the derusting grade of the steel pipe internal-surface after the processing is at Sa3.0, anchor line degree reaches 30～80 μ m, the dustless cleaning of inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100796247A CN100525932C (en) | 2006-03-06 | 2007-02-28 | Anticorrosion powder-liquid cross-linked coating technology for inner wall of steel pipe |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610056716.9 | 2006-03-06 | ||
| CN200610056716 | 2006-03-06 | ||
| CNB2007100796247A CN100525932C (en) | 2006-03-06 | 2007-02-28 | Anticorrosion powder-liquid cross-linked coating technology for inner wall of steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN101058090A true CN101058090A (en) | 2007-10-24 |
| CN100525932C CN100525932C (en) | 2009-08-12 |
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| CNB2007100796247A Active CN100525932C (en) | 2006-03-06 | 2007-02-28 | Anticorrosion powder-liquid cross-linked coating technology for inner wall of steel pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106140587A (en) * | 2015-03-25 | 2016-11-23 | 上海图博可特石油管道涂层有限公司 | Inner coating process for transfer oil and the heavy caliber pipe of natural gas |
| CN110318873A (en) * | 2018-03-29 | 2019-10-11 | 宝山钢铁股份有限公司 | A method of eliminating GT hot passage parts deposit |
-
2007
- 2007-02-28 CN CNB2007100796247A patent/CN100525932C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106140587A (en) * | 2015-03-25 | 2016-11-23 | 上海图博可特石油管道涂层有限公司 | Inner coating process for transfer oil and the heavy caliber pipe of natural gas |
| CN110318873A (en) * | 2018-03-29 | 2019-10-11 | 宝山钢铁股份有限公司 | A method of eliminating GT hot passage parts deposit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100525932C (en) | 2009-08-12 |
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